THE GILLETT DIESEL SERVICE BALL BUSTER SUPER TURBO and HI-FLOW POWER OUTLET

MORE AIR + LESS EXHAUST BACKPRESSURE = MORE POWER WITH LESS HEAT!

   With all of the performance products currently available and still arriving on the market, why the need for another aftermarket piece for the 7.3L Powerstroke?

   Here’s why the GDS Ball Buster turbo and Hi-Flow power outlet are the missing pieces to the7.3L Powerstroke performance puzzle. As we all know, there is no shortage of tuners, chips, exhaust systems, intake systems, ect. for these engines. What we haven’t had, is a turbocharger that truly makes sense. Let’s look briefly at what the major problems are with the turbo on the 7.3L, and then we will look at how to solve them.

  1. The first problem encountered is the surge problem on the stock turbo. The stock turbo surges very easily which is a drivability problem at best and a turbo life reducer or breaker at worst. This surge problem also is quite common on the ball bearing turbo.
  2. The second problem is that the stock turbo is far too restrictive on the exhaust to run with fuel system upgrades. The stock turbine housing and turbine wheel head size are too small to flow well. In fact this problem is so bad that at 17psi of intake boost, the exhaust backpressure will be over 35psi! This is why the difference in a pre-turbo pyro reading and a post-turbo pyro reading can vary by over 600 degrees! Many fuel system upgrades will easily take exhaust temperatures to over 1700 degrees pre turbo, making the truck un-drivable for pulling grades when loaded.
  3. The third problem is the weakness of the turbine wheel in both the stock and ball bearing upgrade turbos. The ¼” turbine wheel quill and small frame size limit these turbos to very mild upgrade applications.
  4. The fourth problem is the limited compressor capacity of the stock turbo. This comes from both a small compressor wheel and compressor inlet size.
  5. The fifth problem is the stock wastegate actuator. This is set to open far too soon (5psi), and the weak spring makes it useless on upgrade applications.

     We could go on with more of the turbos problems, but this list has covered the major weak points. Perhaps the most unique weakness is that there is such a lack of true upgrades for the Powerstroke turbo when compared to other applications. This void in aftermarket turbo availability and turbo upgrade parts stems mainly from the uniqueness of the O.E. turbo. The 7.3L Powerstroke turbo is unique in its mounting and in the fact that it is a reverse rotation turbo. This means that for the most part any upgrade components need to be cast from scratch to fit the current mounting and turbo, or a series of parts to completely change the turbo and mounting to a standard rotation turbo must be applied to the engine. The first option would limit you to a limited strength partially stock turbo unless you replaced the entire turbo with a stronger unit. Although a “bolt on” replacement turbo is available, it still utilizes a ¼” turbine wheel quill which limits the turbo in strength. This turbo also does not offer enough exhaust flow to accommodate those looking for safe egt’s when running big injectors. It also offers no option to upgrade the stock e.b.p. valve assembly, which further limits exhaust flow.

   Let’s take a look at the other turbo upgrade option, changing the turbo and all its mounting parts to something larger and more capable. This option may work for a few people but there are definitely some drawbacks. First, you are locked into a specific vendor for all future turbos and or mounting parts (a problem that can be a bit annoying when you’re on the road looking for replacement parts). Second, you are limited to the performance of that particular turbo. This is a problem if that turbo disappoints you in its spool up, strength and performance.

   What the 7.3L motor needs is a turbocharger that will let you run more fuel without running dangerously hot egt’s. A turbo that will bolt on without any modifications so that you can keep all the upgrades you have currently invested in. This turbo would need to flow enough on both the intake and the exhaust to make it worth upgrading. It would need to be stronger than any currently available upgrade turbos, without being so big that you can’t get it to respond in day to day driving. This turbo would also need to be a good value for the money and let you take your engine up to the next level of performance, a level that has pretty much been unattainable up to this point.

   Now let’s take a look at the newly available GDS BALL BUSTER turbo, a completely new turbo built from scratch in the U.S. just to fill the void in Powerstroke upgrades. The GDS Ball Buster will flow more exhaust and lower egt’s more than any currently available “bolt-on” turbo, and will respond better and out perform any currently available “will fit” mixture of parts and turbo. It is also the strongest turbo currently available for the 7.3L Powerstroke. The GDS Ball Buster is a bolt-on turbo that will finally allow the Powerstroke to breathe, and instead of the turbo being the choke point in the system, this turbo will have you looking at all new ways to upgrade your motor to take advantage of the Ball Busters full strength and performance potential. Below is a brief outline of the turbos major upgraded features;

bullet A larger diameter turbine wheel, compressor wheel and bearing system!
bullet Larger iconel 713 turbine wheel for increased strength. Turbo has an oversized turbine shaft diameter and 5/16" diameter quill thru the compressor wheel as opposed to the stock and ball bearing turbo 1/4" quill shaft.
bullet High performance T-61 compressor wheel. Better than the stock or ball bearing turbo. Capable of higher pressure ratios than either and with over 30% better flow (91mm as opposed to 88mm ball bearing turbo or 80mm stock compressor wheel).
bullet Stronger 360 degree, bolt in thrust bearing and larger heavy duty hydrodynamic journal bearing system.
bullet Turbo is a true "bolt on" turbo for 99.5-03 powerstroke diesels that allows you to use any combination of intake and exhaust upgrades and with the exception of a required 4" intake hose (included in kit) can be used with all of your stock or upgraded components (a GDS Hi-Flow Power Outlet is recommended).
bullet Larger turbine wheel head and free flowing 1.00 a/r turbine housing for huge reductions in drive pressure and far lower e.g.t.'s. This will allow for higher fuel delivery levels to be run without having to "back off" to prevent engine damaging exhaust temps.
bullet Typical results of 200-350 degrees cooler than the stock turbo and about 150-200 degrees cooler than the ball bearing turbo.
bullet Large 4" inlet ported shroud intake housing & inlet hose (stock turbo is 3").
bullet Provides over 30% better intake flow for better performance.
bullet Features map width enhancement slot for wider compressor map. This eliminates common turbo surge and lowers the compressor choke point.
bullet High spring rate, adjustable wastegate actuator to prevent wastegate "blow off" at higher boost levels and allow for less exhaust restriction at top end, while maintaining the bottom end response of a smaller turbo.
bullet Turbo is field serviceable and can be rebuilt by any turbo shop at a reasonable price.
bullet VSR balanced for no compromise, performance and durability.
bullet 100% made in the U.S.A. (from the foundry to the final build!)
bulletKit includes everything you need for installation, GDS Ball Buster turbo, 4"compressor inlet hose, 4" hose clamp, oil inlet o-ring, oil outlet o-ring. We do recommend using a GDS Hi-Flow Power Outlet for best results.

 

     
     

Comparison of stronger Ball Buster components including Turbine Wheel, Bearings & Thrust System, Compressor Covers & Wheels (Ball Buster Turbo parts are pictured on the left in each photo, compared to the stock Turbo components on the right).

 

Now that we have covered the major design features of the GDS Ball Buster, and the need for the turbo upgrade, lets take a look at a brief summary of what our testing has shown so far. The following results have shown themselves to be typical;

bulletWhen compared to the stock turbo, crossover from positive pressure to negative pressure is moved up to about 25 psi, this is the point where the intake manifold pressure and exhaust back pressure equaled out. Pressure started going negative after 25.  Remember that the stock turbo has over 35 psi of exhaust backpressure at 17 psi intake pressure! When compared to the ball bearing turbo, our turbo makes about 10 psi less backpressure at equal intake pressures (the ball bearing turbo makes 35 psi of exhaust backpressure at 25 psi intake pressure). The GDS Ball Busters turbos crossover point is optimum because it matches the maximum that you can get through the intercooler on the 99-03 Powerstroke.
bulletPower gains with a Superchip tuner are about 112hp with the GDS Ball Buster, compaired to 100hp with the ball bearing turbo. With the GDS Ball Buster turbo we make the same horsepower as the ball bearing turbo at 4 p.s.i. less intake pressure and 10 psi less exhaust backpressure.
bulletOn a stock truck, with no other performance enhancements, we gain about 5-15 hp, 10-25 ft. lbs. and drop about 100 degrees exhaust temperature. We also gain about 1.5 seconds in 0-60 mph times and up to a 1.5 mile per gallon fuel economy gain.
bulletExhaust temperature tests on a chipped truck pulling a 6% grade @ 60mph. with an 8,000 lb. load were as follows;
bulletThe stock turbo equipped truck buried the pre-turbo pyro at over 1600 degrees!
bulletThe same truck with the GDS Ballbuster turbo brought the pre-turbo pyro temperature down to about 1250 degrees, at least a 350 degree drop from stock, and over a 150 degree drop from the ball bearing turbo equipped truck.
bulletTo further illustrate the more efficent nature of this turbo, and its ability to remove engine life threatening heat, a post-turbo pyrometer probe will read higher temperatures with the GDS Ball Buster turbo. This is a result of, and evidence of, heat getting through the turbo, rather than building up as pre-turbo backpressure.

In summary, if you have been waiting for the missing piece to the Powerstroke performance puzzle, your turbo has arrived!

 

GDS HI-FLOW POWER OUTLET  

   Need to lose more exhaust heat? The GDS Hi-Flow Power Outlet can easily reduce exhaust temperatures over 100 degrees for less than $200.00! While upgrading your turbo or exhaust system, we recommend always installing a GDS Hi-Flow Power Outlet on the turbo to replace the stock outlet piece. This will eliminate the stock EBP valve on most applications, and further reduce exhaust backpressure even on a non-EBP valve equipped motors. The stock outlet piece has three major flaws, all of which are remedied with this long overdue casting.

1.      In most states it contains an electronic backpressure valve to aid engine warm up times. This butterfly valve is located at the worst possible position as far as performance is concerned. It is right where the exhaust is exiting the turbo transitioning from high pressure pre-turbo to lower post turbo pressures. This results in an expansion of the exhaust gas trying to occur right where it hits a huge restriction (the e.b.p valve). This is further amplified by the fact that the exhaust gasses are exiting the turbine in a swirling vortex and hitting the flapper valve within inches of the turbine wheel, further slowing exhaust flow. The GDS casting has no valve or provision for a valve!

2.       The stock casting has a divider wall between the wastegate valve outlet chamber and the main exhaust outlet. This is a bad idea when trying to increase exhaust flow because it forces the wastegated exhaust to back up before it can enter the main exhaust stream and exit the casting. Keep in mind that the exhaust exiting the wastegate valve is coming out at a higher pre turbo pressure so when it has to reverse flow and try to enter the exhaust stream just upstream of the e.b.p. valve, it certainly doesn’t help exhaust flow! The GDS casting has removed this dividing wall completely.

3.      Next is the inside diameter of the exhaust outlet. Stock is about a 2.8” i.d. with the very restrictive valve making its effective diameter much less. The GDS casting is an unrestricted 3.2” i.d., perfect for, and compatible with any performance exhaust systems with a 3.5” or 4” downpipe.

This exhaust outlet casting should drop exhaust temperatures about 150 degrees on a stock turbo and will optimize the exhaust flow with the GDS Ball Buster turbo.

         

The GDS Hi-Flow Power Outlet, in each photo shown to the left of the stock turbo outlet casting on the right.

Copyright © 2004 GILLETT DIESEL SERVICE, INC.
Toll Free; 1-800-638-4679,     E-mail; rich@gillettdiesel.com
Last modified: 01/02/09
                                
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